Method and apparatus for drawing sheet-glass



J. P. CROWLEY. METHOD AND APPARATUS FOR DRAWIN SHEET GLASS.

APPLICATION F|LED1 UNE4. 1920.

Patented 0013. 18, 1921.

sai, %Aiwan %za/mm To aZZ 'whom it may concerns Be it known thot I, JosEPi-i P. CROWLEY, e citizen o'f the United States of America, residing'et Toledo, in the county of Lucas and State of Ohio, have invented certain -hew end useful Improvements in Methods amd Apoemtus for Drew/ing Sheet-Glass, of which the. following is specificzton, reference being; had therein to the accompen ing drawing-s.

Th'envention relates to the inanuhcture of sheet glass by methods of that type in which the sheet is drawn from a piastic mese the opposite surfeces thereof being i cooled and the edge portions being engaged of the giass which is injui'ious to th'qugiity.

It is the object of the present invention to ohtain a method of drawing glass in which there Will be no contact which can pioduce e marrmg effect on either surface of the sheet. The essential feature oi' the method is in forining the contecting surface oi' giess which has e much smoother surface then the most highly pohshed metal. More specificeiiy, my improved iiethod consists in holdingthe di awn sheet out of contact 'With morrin@ surfeces by supporting it upon e second, drewn sheet which is intermediate the some and the heiiding and supporting :folim i in the drawing have ilhstmted an ap petetns coi cyihg out my improved method this being shown in vertical longitudinei se tion.

i As the gehecei type of epieretus is known, li ehaii not descrihe Oi iihstr te the eeme deteii, hut es shown A is the draw chemher et the 'bese of which is the ieceptecie conteinihg the inass giese 'which the sheet is d'ewn. C and *C* ere hceted chenhers above portions of the mass iii the recepteeie B and 'which air-e seoziieted item :in inteemediute space hy iip ti'cs D and D'. e ,des temperin Weii fipeoificetion of Letters :Patenta 'seprabie from each otheix 'The none?? e- 1920. Serial Ne. eeeeee is ei'i enged en apparatus for simniteheouei draw ng two 'pamiiei shects. i

This appa'atus comprises peiis oi" homie roiis arranged fol' engegement With the oppositeedge po'tions of each of the two sheets these roiis being driven et e suitehic speed by e mechansm not shown, The sheets ore drewn Upward to e beoding roii G- and arethen passed around this roli in contact Witheaoh other. The ad'jacent sui'- 'faces of the sheets ere, however, suioiently cooicd before they come into contact to prevent adhesion. After passing the bend ing roll the two sheets stili in contact pass over idiei and guide TOHS H- and then on to the drawing table J which mv he of eny suitable Construction. To hoid the sheetc seperate until they engege the hendiig roli G, preferehiy arrange e i'oii l'. therehetwecn which holds the lower portion of the sheets in suhstantai peraiielism end changes the direction of the sheet but comes in direct contact With the hending roll, Vith the apperatns as described which is provided With eli the necessary euxiiia'y devices used in the single shee drawing appemtus of this type, 'thi two sheets Will he drown snnuiteneousiy and the coinpletion of the operation ere having been heid out oi' direct cohtect wit' either the hendiig roli, idlei' i'oils 01 ing table it Will. he of high quality free from mars. bn the other hand., lower sheet which may he somei K QTOT iii quality is :aevertheiess umoie purposes not i equir ng the highest oei` i What i claim ne any invention is:

IL. in the process for menufacturing sheet giass, the step of edvancing di'iiwn sh 'heee 'from inju'ions Contacts by the inter" position between the sem-e and its supocte' of a` ii'ectiy cent* siiffece of giess,

ne process 'toi' manufacturing she t step oi edvencin the Cifz'lW' sh injuriw .JS hy the inter and its supports e fo? v .c iiriiw' sheet giesm ecin; the 81'.. v us e t ger@ two sheets, the ho of one of seid sheets from io urioue coetect hi center j: 171 V .me. process of M hty Salaam; & ing POEORS scprsb@ %momet h each other. Mangas Of manufacuz'ng sheet mems drawing &mem pass'g said sheas i: in Sep-Mame contact',

maus drawing e rom each ;e until il suicenby 300186 'to 'adheson and in then 1 (u 1 4 in@ conbac' With each nimic &na mam' mmsg mem m wnmc dur- ;'enmner of th& drawing operaon. 'marmus for &he manufacture of game, cbmp'bng a. recepmcle for 13321315 for dmwug a *plusheevs 'me surface amazing sheei 8 An uppa'ams for the manuacum of sheet glass, compsng EEPRCQ 'ku' &he flss means for drawing ve'tically surface of mba glas& in sz za- Jfii plumhy Of separate sheet@ Luta& a cmm an bending roll about which said drawn in' separable contact W each ath-er.

appzmms for the nmufactu a,

CID 

